State Street pipeline construction, 1904
Electric Pump Installations at Lardner’s Point Pumping Station
View from the Inclined Plane near Philadelphia, 1838
Standard Philadelphia (B) Hydrant
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
New Mill House at Fairmount
Water Works Standpipe, 1853
Baldwin Locomotive Works
View of Fairmount Water Works, ca. 1827
Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
